Gas mixer, gas mixing system, gas engine

Abstract

A gas mixer for mixing a first gas and a second gas, including a gas housing, a Venturi tube, a flow body for the first gas arranged in the Venturi tube to form a mixing gap, an inflow tube connected to the Venturi tube, to an inflow opening to the Venturi tube for the second gas, and an actuating element for varying the inflow cross section of the inflow opening. The actuating element has a first and a second actuating part which restrict the inflow cross section. The first actuating part is a first gas housing part and the second actuating part is a second gas housing part. At least one of the gas housing parts forms part of the Venturi tube and/or of the inflow tube At least one of the gas housing parts can be moved with respect to another and has a rotor of a linear motor.

The invention claimed is: 
     
       1. A gas mixer for mixing together a first gas and a second gas, comprising:
 a gas housing; 
 a venturi tube; 
 a displacement body for the first gas, the displacement body being arranged in the venturi tube to form a mixing gap; 
 an intake tube connected to the venturi tube and providing an intake opening to the venturi tube for the second gas; and 
 a control element by which an intake cross section of the intake opening can be adjusted to different values, wherein the control element comprises a first and a second control part forming boundaries of the intake cross section, wherein the first control part is formed as a first gas housing part, and the second control part is formed as a second gas housing part, wherein at least one and/or of the intake tube, wherein at least one of the gas housing parts is movable with respect to the other gas housing part, and wherein the movable gas housing part includes an armature of a linear motor. 
 
     
     
       2. The gas mixer according to  claim 1 , wherein the displacement body extends along a longitudinal axis of the venturi tube, and the mixing gap is formed transversely to the longitudinal axis. 
     
     
       3. The gas mixer according to  claim 1 , wherein only the first gas housing part is movable with respect to the second, fixed, gas housing part, or only the second gas housing part is movable with respect to the first, fixed, gas housing part. 
     
     
       4. The gas mixer according to  claim 3 , wherein the fixed gas housing part establishes a longitudinal position of the intake opening, and the size of the mixing gap is established substantially as a distance between the intake cross section and the displacement body. 
     
     
       5. The gas mixer according to  claim 4 , wherein the longitudinal position is established in an area of a section of a substantially cylindrical part of the displacement body extending parallel to a longitudinal axis of the displacement body. 
     
     
       6. The gas mixer according to  claim 1 , wherein both the first and the second gas housing parts are movable, and the first and second gas housing parts are each movable with respect to the other. 
     
     
       7. The gas mixer according to  claim 1 , wherein a size of the mixing gap, which is substantially a distance between the intake cross section and the displacement body, is established by varying a longitudinal position of the intake opening relative to the venturi tube. 
     
     
       8. The gas mixer according to  claim 7 , wherein the longitudinal position is established in an area of a section of a substantially conically tapering part of the displacement body extending transversely to a longitudinal axis of the displacement body. 
     
     
       9. The gas mixer according to  claim 1 , wherein the first and/or the second gas housing part forms part of a wall of the venturi tube, wherein the wall forms a dome that covers an orifice of the intake tube and projects into an interior of the venturi tube. 
     
     
       10. The gas mixer according to  claim 1 , wherein a movable gas housing part forms only part of a wall of the venturi tube, which part is parallel to a longitudinal axis of the venturi tube. 
     
     
       11. The gas mixer according to  claim 1 , wherein a fixed gas housing part forms part of a wall of the venturi tube, which part extends transversely to a longitudinal axis of the venturi tube. 
     
     
       12. The gas mixer according to  claim 1 , wherein a stator of the linear motor is arranged on a gas housing part not forming a boundary of the intake cross section. 
     
     
       13. The gas mixer according to  claim 12 , wherein the stator of the linear motor is formed on the intake tube. 
     
     
       14. The gas mixer according to  claim 1 , wherein each of the movable gas housing parts comprises an armature of a linear motor. 
     
     
       15. A gas mixing system or gas engine, comprising a gas mixer according to  claim 1 .